Problem (clouding) after curing with uv loca

I replace new glass with digitizer and apply loca glue on the lcd. Probably I put it to much. I cured it in 36W uv lamp 3 times by 4 minutes. After that I assembly it and display looked cloudy.

Where I did wrong?

Here are the pictures:

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3 Answers

Chosen Solution

You put too much of it and the glue that remains uncured underneath the edges (because uv light doesn't reach it), found its way to the backlit of the LCD. Th glue stays between the lcd and the backlight panel and produces the cloudy image.

Solutions

1) carefully remove the backlight and clean it with alcohol (ridiculously time-consuming)

2) buy a backlight panel or find a broken screen of your model phone, remove the backlight, remove your backlight panel too, clean the back of your lcd after removing original backlight very gently with a very soft cloth and alcohol and then install the other backlight on your lcd.

NOTE that any debris that stay between the panel and the lcd will produce a dark spot, so make sure everything is crystal clean before installing the new backlight.

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I did a replacement last night with the same outcome, if anyone knows the cause of this it would be greatly appreciated. I feel like it's because the glue hasn't completely cured out due to not having a proper uv light during the curing process. As far as I know if the LCD was over heated it would turn the screen yellow which isn't the case in my situation and from what I can tell it's not the case in the original posters situation either.

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Did you find where is the problem?

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Sorry pacific112j I have not been able to find anymore information on this yet, I've searched Google far and wide. we seem to be having the same problem though. Maybe it's our glue? You said you had a uv light so I don't see any reason for yours to not have cured completely I however did not have a true uv light but I did test the light and glue I was using to make sure it would cure before using it on the screen. Have you used the same glue on any other screens without any problems?

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Your problem is not glue or UV light. Before you aplay glue, you must remove backlight or seal the frame with special sealer, this procedure prevents local leaking in to backlit.

When you aplay loca, it was going in to the gaps between frame and LCD and was damaging backlit sheets which is responsible for light up screen in correct ways. Now glue seal layers between the sheets and light is reflecting in difference ways that's why the screen are cloudy.

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Hello Zaza Chokheli. I ve started doing such job too, and i have issues like this, black areas in light http://s15.postimg.org/5exwvycnv/2016010.... I am protecting the backlit sheets so that glue dont get in.. any ideas?

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Hi. That's can be pressure marks or when you clean lcd, you was clean up (removing) conductive paint in two corners. This two dots are responsible and works for screen as anti static. Check it properly and if it's not glue leakage, probably another two problems. Static problem you can sort out with silver paint. The pressure marks are bit difficult to remove, sometimes they disappear itself.

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Finally it was glue. I removed each one of sheets and cleaned them. But after one hour in one corner appeared a small light leakage..

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pacific112j will be eternally grateful.
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